I am having this same problem. I tried doing the recommended things above in the Tables but my images do not line up. They stagger left, center and right in three lines beneath each other. I only want them to line up horizontally in a straight line. Please help. I set my max album size width to 175 and my thumbnails to 150 and it still does not put them on 1 line.

I have tried adding Column-Matic but I can't get that to work either. I am new at this and trying really hard to do it myself!

Also: make a dummy album and set the parents of the albums you want to show to that dummy album.
Then: use the script %%wppa%% %%album=...%% ( the dummy album ) or [wppa type="album" album=".."][/wppa]